Writing to response and issuing sendError

[Michael-O]

Hi,

I am having again trouble with the respone.sendError method. The docs 
say that an IllegalStateException is thrown if response has already been 
committed. So this should cause an exception:

protected void doGet(HttpServletRequest request, HttpServletResponse 
response) throws ServletException, IOException {
  PrintWriter out = response.getWriter();
  out.println("ERROR");
  out.flush();
  response.sendError(404);
}

The exception is thrown out to the console but the response is still 
written. If I leave out the flush (which commits the response). The 
error page comes up.

Is this undefined behavior or some missing code path to transform the 
ISE to a HTTP 500 error response?

I am on Tomcat 6.0.35

Thanks,

Mike

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